Device for molding-cement into forms to be tested



(No Model.)

L. GI'RDLER. DEVIGE FOR MOLDING CEMENT INTO FORMS TO BE'TESTED.

No. 423,756.- Patented-Mar. 1-8, 1890 I nlllli I:

gimvamboz lewd Qzlrailer. @3311 $1 1 mom um UNITED STATESTPATENT OFFICE.

LEWIS GIRDLER, OF SELLERSBURG, INDIANA.

DEVICE FOR MQLDING CEMENT INTO FORMS TO BETESTED.

SPECIFICATION forming part of Letters Patent No. 423,756, dated March 18, 1890. Application filed October 21, 1889. Serial No. 327,654. (No model.)

act description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to molding hydraulic cement into forms to be tested as to the strength of the cement.

Heret-ofore it has been the common practice to fill a mold with cement mortar and press it in by hand, and sometimes hammers are used to make the mortar compact. This is a slow method and the results are very uneven, so that it is difficult to get a fair test of the cement, and when it is understood that tests are frequently made as often as every second barrel the importance of a more reliable and speedy method will be appreciated.

The object of this invention is, first, to provide means whereby the test-molds may be rapidly filled with cement and uniformly pressed, and, second, means for indicating the amount of pressure, so that it shall appear to the eye of the operator and control his action.

To this end my invention consists in a funnel to lead to the mold, a follower fitted to slide in the funnel, means for mechanically forcing the follower to so slide, and means for indicating the amount of pressure brought to bear on the follower, the details of which are hereinafter more particularly described, and the features of novelty pointed out in the claims, reference being had to the accompanying drawings, in which- Figure I is a View of the whole device in front elevation, Fig. II is a view looking down upon top of a mold one-half working size. Fig. III is an under side view of a funnel to fit upon the mold, and Fig. IV shows a central vertical section through the mold and funnel in position for service,

6 represents a common mold, separable on the line 7. The two parts are kept in exact registry with each other by dowels 8, and may be quickly and rigidly secured by swinging clamp-yokes 9,

-10 represents a leader, which I call a funnel. Its interior contour corresponds exactly with the interior contour ofthe mold, with which it may be brought to register by any usual means such, for example, as the upward-projectingrim 11 of the mold fitted to enter a corresponding annular recess 12 in the under side of the funnel 1O. 13 represents a follower or piston fitted to slide freely within the funnel, This follower is connected with the treadle 14 by means of a lever 15 and rod 16. The treadle is pivoted to some perma nent fixture-=such as the post 17-and the lever 15 communicates with a spring-balance 18, provided with the usual graduateddial and pointer for indicating the amount of strain brought to bear on it.

In operation the mold and funnel are to be placed together, as shown in Fig. IV, and then placed on the table beneath the follower 13.

Now a measured quantity of cement mortar, which has been proven by experiment to be more than enough to fill the mold, is put down into the mold through the funnel, and the follower 13 is brought to bear thereon by treadlepressure, and when the prescribed pressure is indicated on the dial the treadle must be released, allowing the follower to rise out of the funnel. Now the mold and funnel may be removedfrom beneath the follower, and the mold may be separated from the funnel and the surplus cement be sheared from the mold, It is evident that this operation may be repeated any number of times with exactly the same result, thus insuring a fair and unvarying test for the cement and saving agreat deal of wasted time and consequent vexation, which was common to the old irregular methods.

The use of my funnel in connection with the mold would of itself be a great advantage by insuring a head of mortar on top of the a '*-dent that the follower and treadle attachment has an advantage independently of the presslire-indicator,

Having thus fully described my invention, what I believe to be new, and desire to secure by Letters Patent, is the following:

The combination of a cement-mold, a fun nel removably fitted thereon, a follower fitted to slide freely within the funnel, atreadle'connected with the follower, and a pressureindi- In testimony whereof I affix my signature in cator connected with the said follower, sub-1 presence of two Witnesses.

stantially as shown and described, whereby, first, pressure may be brought to bear on the contents of the mold and funnel, and, second, the pressure may be indicated to the eye of the operator, as and for the purpose specified.

LEWIS GIRDLER. Witnesses:

WM. E. HYATT, JOHN M. NIoKLEs. 

